S 972-003-C05
CAUTION: MAKE SURE TO GET THE LOCAL BAROMETRIC PRESSURE (NOT CORRECTED
_______
TO SEA LEVEL) FROM THE CONTROL TOWER. AN INCORRECT PRESSURE
CAN GIVE YOU AN INCORRECT TARGET SELECTION.
(3) Find the barometric pressure (not corrected to sea level).
(a)
If the local barometric pressure (LBP) is not available, use the altimeter setting to determine the LBP (Fig. 201A). 1) Find the point where the altimeter setting goes across the
applicable field elevation to get the LBP.
(b)
The equation to find LBP using Altimeter Setting in "HG and Standard Local Barometeric Pressure (SLBP) is:
LBP = (Altimeter Setting "HG - 29.92) + SLBP
NOTE: You can do a check of the LBP by dialing the altimeter
____ to 0 feet altitude and reading LBP from the barometric pressure setting window (if altimeter is available).
S 972-004-C05
(4) Find the engine speed target for the test (Fig. 202).
(a) Find the OAT on the table.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. CFM56-3B-2 ENGINES ú
71-00-01
(RATED AT 22K) ú CONFIG 5 ú C01 Page 203 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
33
LOCAL BAROMETRIC PRESSURE - IN. HG
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
282930 3132 ALTIMETER SETTING - IN. HG
Altimeter Setting Conversion to Local Barometric Pressure
Figure 201A
E61188
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. CFM56-3B-2 ENGINES ú
71-00-01
(RATED AT 22K) ú CONFIG 5
ú C02 Page 204
ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(b) Read across the table to find the target for that OAT and barometric pressure.
NOTE: If ambient temperature or barometric pressure falls
____ between values given in trim table, correct data can be obtained by interpolation.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. CFM56-3B-2 ENGINES ú
71-00-01
(RATED AT 22K) ú CONFIG 5 ú C02 Page 205 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
NOTE:TRIM DATA WITHOUT AIRBLEED OR ELECTRICAL LOAD CONDITIONS.
TOLERANCES
LOW IDLE +3.0/-1.0 %N2 P-P PMC OFF +0.5/-0.5 %N2 HIGH IDLE +3.0/-0.7 %N2 P-P PMC ON +1.5/-1.5 %N1
Trim Tables (Low/High Idle, Part Power [92.5 Degrees PLA], Accel/Decel)
Figure 202 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. CFM56-3B-2 ENGINES ú
71-00-01
(RATED AT 22K) ú CONFIG 5
ú C02 Page 206
ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
NOTE: TRIM DATA WITHOUT AIRBLEED OR ELECTRICAL LOAD CONDITIONS.
TOLERANCES
LOW IDLE +3.0/-1.0 %N2 P-P PMC OFF +0.5/-0.5 %N2 HIGH IDLE +3.0/-0.7 %N2 P-P PMC ON +1.5/-1.5 %N1
Trim Tables (Low/High Idle, Part Power [92.5 Degrees PLA], Accel/Decel)
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